Same here for the following system upgraded to 15.04 from 14.10
yesterday...
System Information
Manufacturer: Dell Inc.
Product Name: XPS L421X
Version: A04
Serial Number: JG74GS1
UUID: 4C4C4544-0047-3710-8034-CAC04F475331
Wake-up Type: Power Switch
SKU Number: xxx123x#ABA
Family: 103C_5335KV
This also seems relevant...
Handle 0x0028, DMI type 27, 14 bytes
Cooling Device
Temperature Probe Handle: 0x0029
Type: Fan
Status: OK
OEM-specific Information: 0x00000000
Nominal Speed: 0 rpm # while the fan is audibly running!
Handle 0x0029, DMI type 28, 22 bytes
Temperature Probe
Description: Temperature Probe
Location: Processor
Status: OK
Maximum Value: Unknown
Minimum Value: Unknown
Resolution: Unknown
Tolerance: Unknown
Accuracy: Unknown
OEM-specific Information: 0x00000000
Nominal Value: 2594.0 deg C
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https://bugs.launchpad.net/bugs/1448441
Title:
After upgrade to Ubuntu 15.04, wrong temperature readings after wake
from suspend cause fan to go crazy
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